I've created a little #Mastodon 馃悩 toot edit history viewer that lets you explore the history of a toot, edit by edit through the #MastodonAPI. Here's an example: https://tomayac.github.io/mastodon-edit-history/#https://mastodon.social/@firefoxwebdevs/116002119945073671. Source code: https://github.com/tomayac/mastodon-edit-history.